dependabot-approve-and-auto-merge.yml

name: Dependabot pull request approve and merge
on: pull_request_target

permissions:
  pull-requests: write
  contents: write

jobs:
  dependabot:
    name: Dependabot
    runs-on: ubuntu-latest
    if: ${{ github.actor == 'dependabot[bot]' }}
    steps:
      - name: Dependabot metadata
        id: dependabot-metadata
        uses: dependabot/fetch-metadata@v1.3.3
        with:
          github-token: "${{ secrets.GITHUB_TOKEN }}"

      - name: Approve a PR
        if: ${{ steps.dependabot-metadata.outputs.update-type != 'version-update:semver-major' }}
        run: | 
          gh pr review --approve "${PR_URL}"
          gh pr edit "${PR_URL}" --add-label "dependabot: auto approve"
        env:
          PR_URL: ${{ github.event.pull_request.html_url }}
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Auto-merge non major updates
        if: ${{ steps.dependabot-metadata.outputs.update-type != 'version-update:semver-major' }}
        run: |
          gh pr merge --auto --squash "${PR_URL}"
          gh pr edit "${PR_URL}" --add-label "dependabot: auto merge"
        env:
          PR_URL: ${{ github.event.pull_request.html_url }}
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Comment + label major updates
        if: ${{ steps.dependabot-metadata.outputs.update-type == 'version-update:semver-major' }}
        run: |
          gh pr comment "${PR_URL}" --body "I'm **not approving** this PR because **it includes a major update of a dependency**"
          gh pr edit "${PR_URL}" --add-label "dependabot: manual approve"
          gh pr edit "${PR_URL}" --add-label "dependabot: manual merge"
        env:
          PR_URL: ${{ github.event.pull_request.html_url }}
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}